please answer fast
c) a/3b
d) zero
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Answer:
a/3b
Explanation:
x=at
2
−bt
3
⇒ Velocity =
dt
dx
=2at−3bt
2
Acceleration=
dt
2
d
2
x
=
dt
d
(2at−3b
2
)=2a−6bt
or a=2a−6bt
Making a=0
⇒2a=6bt
⇒t=dfrac2a6b=
3b
a
.
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